Embroidering-machine



11,0 Model.) 2'SheetSe-Sheet 1.

R. T. SMITH.

EMBROIDERING MACHINE.

110. 416,811. K I Patented Dec. 10.11889.

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v N. PETERS. Phdlwumngrnphar, Wnhinglun D. Q

(No Model.) 2 Sheets-Shet 2;

R. T. SMITH.

EMBROIDERING MACHINE. N0..416, 811. Patented 11%..10, 1889;

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N, PETERS. PhmoL'flhugraphnr, Washmglon. D C,

. UNITED STATES PATENT OFFI E.

ROSWELL T. SMITH, OF NASIIUA, NEW HAMPSHIRE.

EMBROlDERlNG-M'ACHINE.

SPECIFICATION forming part of Letters Patent No. 416,811, dated December10, 1889. Application tiled JuneZ, 1387. Serial No. 240,053. (No model.)

broidering-Machines, of which the following is a specification.

My present invention relates to that class of mechanism shown anddescribed in an ap plication for Letters Patent filed by me the 30th dayof March, 1887, Serial No. 233,028, said machine being intended for theproduction of ornamental designs and trade-marks in which the patternconsists of a comparatively small group of isolated figures. In theprior invention the work is executed by a sewing-machine of any knownconstruction, and the several adjustments of the tambourframe areeffected by means of slides moving in right lines and at right angles toeach other, the required movements being communicated to thetambour-frame through pulleys of different diameter, whereby theexaggerated movements of the motor-arm or tracer are diminished and thepattern or exeouted design is reduced to the required size. The stitchesin which the designs are Worked may boot the same or of unequal lengths,and between each stitch formation the action of the sewing mechanism isstopped automatically to permit the ensuing stitch formation.

In this mechanism the relative size of the patterns and designs orfinished work can only be varied by shifting the pulleys interposedbetween the tracer or motor arm and the support for the tambour-frame. VThe mechanism also is somewhat cumbersome in comparison with thepantograph, and changes or variations in the size of the worked figurerelatively to the pattern cannot as easily and quickly be made.

It is'the objectof my present invention,

therefore, to substitute for the devices by which the stitch adjustmentis effected a pantograph apparatus which is free from the ob-,

present case any known construction thereof which may answer my purpose.

The invention consists in the several novel features of construction andnew combina tions of parts hereinafter fully set forth, and

definitely pointed out in the claims which follow this specification.

Referring to the accompanying drawings, Figure 1 is a plan View of amachine embodying my invention. Fig. 2 is a partial vertical section intheline 2 2, Fig. 1. Fig. 3 is a vertical section in the line 3 3,Fig. 1. Fig. 4 is a side elevation of the automatic stopping andstarting mechanism. Fig. 5 is a vertical section of Fig. 3, taken in theaxial line of the shaft. Fig. 6 is a partial plan view of Fig. 4. Fig. 7is a' detail perspective of the shipper-arm by which the driving-pulleyis unclutched from its shaft at each revolution. 1

frame 2 of rectangular form and having upon one side an adjustable plate3, on which the hooks 4 are placed. Through a lug 5 upon this plate istapped a set-screw 6, having bear ing in a post 7 on the frame, wherebya strain is imparted to' the web in one direction. Upon one arm of thetambour-frame are formed or mounted lugs 8, said lugs being providedwith holes, by which it is attached to a rod or bar 9, the latter havingpins 9, which engage the holes in said lugs and enable the tambourframeto be instantly engaged with anddis engaged from its connection. Thisrod is attached at a point between the lugsS to the directing-arm 10 ofthe pantograph. Rising from the table 1 at points separated from eachother as far as practicable are guides 11, in which slide parallel bars12, arranged at right angles to the rod 9. These bars 12 carry upontheir ends short sleeves 13, in which the rod 9 moves freely in thedirection of.its length. The arm 10 of the pantograph is connected withthe cross-arm 14 by a pivotjoint 15, the pivot-bolt of which passesthrough the end of the directing-arm 10 and thence through a plate 16,having rigid connection with the rod 9, carrying the tambour-frame 2.Beneath the table in rear of the rod 9 are drop-brackets 17, in which isj ournaled a shaft 18, carrying two pulleys 19 of equal diameter andarranged directly beneath and in the same planes with the bars 12. Thesepulleys lie in slots 20 in the table and rise in said slots to a pointabout in the plane of the tablesurface or a little above the same, sothat the rounded bars 12 may lie in the grooves in their peripheries.Around each pulley are carried wire cables 21, attached at their ends tothe bar 12,the said ends of the cable being carried past each other forattachment, as shown in Fig. 3. At their other ends they are connectedto posts 22, standing in a notch 23 in the periphery of the pulley, andby turning said posts the cables may be drawn tight in thegroove, theconstruction being similar to that employed in attaching and tuning thestrings of a piano. The construction of the other pulley and itsaccessory parts is precisely the same as that hereinbefore described.

The arm 10 of the pantograph, besides being pivoted at its end to therod 14 and arranged at rightangles thereto, is extended rearward andconnected pivotally with a bar 24, parallel. with the rod 14. The end ofthis bar 24 is extended past its pivotal connection with the bar 10, andis mounted on a pivot-bolt 25, which has its seat in a strip or bracket26, mounted on thesurface of the table 1 and straddling one of the barsor rods 12. This bar is preferably supported by feet 2 7, to raise itsufficiently to enable it to cross the rod or bar 12, with which itstands at an angle of forty-five degrees. The purpose of this feature ofconstruction will be described presently. The bar 14 is also extendedbeyond the point 28, where it is pivotally connected to the motor-arm27, and each one of the pantograph-arms is provided wit-h perforations30, arranged 'at suitable intervals for the purpose of shifting thepivotal connections in order to increase or diminish the relativesize ofthe executed patterns in comparison with the chart on which thetracingpoint 31 moves.

It will be understood that the pantograph mechanism lies and operates ina horizontal plane upon the surface of the table 1, carrying thetambour-frame 2, the latter rest-ing upon a tablet or sewing-table in anopening of which the needle reciprocates.

, The sleeves 13, in which the rod or bar 9 moves longitudinally, areswiveled in forks 13, carried by the bars 12, by means of trunnions 32,tapped through the ends of the fork. The latter element has a shank 33,which is swiveled upon the end of the bar 12, as seen in Fig. 3. Thepurpose of this constructibn is to enable the rod 9 to move freely inthe said sleeves without the possibility of binding therein.

The pattern is placed directly beneath the tracer 31, and by followingits lines in the usual manner and order the stitch adjustments will bemade successively, the relative degree of movement of the tambour-frameas compared with the distance traversed by the tracer 31 being capableof control bythe several adjustments of the pivotal connection 25 uponthe bar 26 and the corresponding shift of the remainingpantograph-connections 15, 15, 28, and 28. This will be readilyunderstood from Fig. 1. For example, the pivotal attachment of thepantographto the bar 26 is at the point marked for convenience ofdesignation by the fraction i, which indicates the extent of themovements of the tambour-fr'ame as compared with those of the tracer 31,the scale of reduction being in the proportion of one to four. It may benoted in this connection that the points at which the pivotalconnections of the frame are made are indicated in a similar manner onthe pantograph-arms. If, now, the pivotal connection 25 be shifted tothe point designated on the bar 26 by the fraction it will be seen,first, that the acting distance from the pivotal point 25 to the firstcross-arm 10 of the pantograph is diminished by the length of a linedrawn through the former point of attachment to a second line drawnthrough the present pivotal point at right angles to the firstline;secondly, the distance between the parallel arms 14 and 24 is diminishedby the same extent as the shortening of the acting distance between thepivotal point and the bar 10, while, finally, the motor-arm 27 moves thesame distance to the left, thereby extending the interval between it andthe arm 10, which remains in its former position. It, now, thepantograph be operated, the design will be reduced to one-fifth the sizeof the pattern under the tracer.

The arrangement of the angular bar 26 at an angle. of forty-five degreeswith relation to the two rectilinear lines of action of the pantograph,and using said bar as a pivotal base for the end ofthe arm 24, enablesme by simply shifting such point upon the bar to increase or diminishthe acting distances of the several members of the pantograph equally,and thereby to vary the scale on which the designs are executed to anydegree desired.

The sewing mechanism consists, preferably, of a sewing-machine arm 34 ofthe Singer type, having a shaft, a needle-head, tension, and othernecessary devices. This arm and its accessories are essentially the sameas the devices described and shown in my application No. 233,028,here'inbefore mentioned. This portion of the mechanism thereforerequires little, if any, description. I drive the sewing machine,however, by a pulley 35, mounted directly upon the shaft which drivesthe needle-arm in the head-block 36. These features being similar tothose fully set-forth in my former application of March 30, N0.

the present case.

233,028, I need add no description thereof in The automatic stopmechanism also is unchanged from that shown in my former case, and isvery similarly combined and operated. The pulley 35 is loose upon theshaft 37, and is driven from any convenient source of power. Mounted onthe shaft rigidly, close by said pulley, is a clutch-carrier 38, inwhich slides a clutch 39, parallel withthe axis of the shaft, andnormally impelled by a spring 40 to move forward into engagement with arecess 41 in the said pulley. In the clutch is formed a notch 42, and anannular groove 43 is also formed in the clutch-carrier 38, in which liesthe curved or semicircular portion 44 of a shipper-arm 45, pivotallymounted on a standard. 46, and having a projection 47, with which aspring 48 engages, by which the circular part 44 is maintained inengagement with the groove 43.

It will be noticed that the curved part 44 is thin at the outer end andgrows thicker toward the other end, as seen in Fig. 7. Consequently asthe clutch-carrier 38 revolves with the shipper-arm 45, lying in thegroove 43 therein, when the notch 42 in the clutchbar makes engagementwith the shipper-arm the latter will draw the clutch-bar out of therecess 41 as the notch 42 rides from the thin to the thicker end'of thepart 44.

In order to release the clutch bar 39 and allow-it to engage with andoperate the pulley 35, a wire 49 is attached to the nose 50 oftheshipper-arm and to a latch-bar 51, with which engages a latch 52,pivotally mounted on a key 53 and normally thrown byaspring 54 intoengagemeiit with the latch-bar 51. The key 53 is pivoted upon the footof the standard 46, and is normally raised to engage the latch 52 withthe latch-bar 51 by means of a spring 55. A finger-plate 56 is mountedon the end of the key, whereby the operator may at any time depress thekey and release the clutch.

In order to insure the automatic disengagement of the clutch after. eachstitch formation,

I place on the clutch-carrier 38 close to the groove 43, a cam-lug 56,which at each rotation strikes the latch 52 and throws it off thelatch-bar 51, thereby permitting the latter to rise and the shipper-arm45 to restore itself to the groove 43, as before, where it will at oncewithdraw theclutch and arrest the stitching mechanism. Thus if theoperator inadvertently depresses the key 53 and holds the same too long,the cam-lug 56 will compensate for such inadvertence and effect thenecessary action without effort on the part of the operator. Although Ihave described these features specifically, they are the same as thoseshown in my application filed the 30th day of March, 1887, Serial No.233,029.

By the invention thus described and shown I havean embro'ideringsewing-machine in thirds or more of time.

which the tambour-frame is carried and the stitch adjustments effectedby a pantograph without complication of parts and with great resultingaccuracy. It will readily be seen that the two pulleys 19 act in perfectunison, and thereby give an adjustment of the carrier bar 9 in a lineexactly at right angles with the latter. The other adjustment in theline of the axis of said carrier-bar 9 is effected by the longitudinalthrust of the .bar 14, and by these two movements, or the'resultants ofany two of them, every possible stitch adjustment can be perfectlyaccomplished. It should also be noted that by combining the cables 21with the pulleys 19 and bars 12 in the manner shown in Fig. 3 I mayadjust the position of the rod 9 by moving either end thereofhorizontally and at right angles to its axis. This is done by simplyturning the posts'22, one to slacken and the other to tighten thecables; hence if the rod 9 is slightly out of line from any cause itsposition may be easily and instantly rectified in this manner. The posts22 also serve to give proper tensionto the cables. The key 53 proj ectstoward the front and the motor-arm 27 of the pantograph is aboutparallel therewith,

said key and arm being operated by the right and left hands,respectively.

By this invention I provide an embroidering mechanism which may be usedas a domestic machine or in manufacturing. By the use of the clutch,which restricts the multiplied action of the stitch-forming device tothe will of an operator, allowing the drivingwheel to run at greatspeed,-whereby a stitch formation may be quickly made, I amenabled to dowork much more rapidly and accurately. More rapidly because without aclutch device, the stitch-forming device must either stop entirely ormove so slowly that the fabric may be moved while the point of theneedleis above the cloth, making the time between the movements of the fabricthree or four times as long as that allowed for fabric adjustment. Bytheuse of the clutch the stitch-forming device may run so fast as .topractically utilize this lost two- More accurately, because without theclutch the fabric must be in place at a given time before the needlereaches it, resulting in inaccuracy from lack or fear of lack of time tomake a proper adjustment. With theclutch the fabric is first adjusted,and then the stitch is instantly taken through the voluntary act of theop-- 1. In an eml)rodering-machine, the combination, with a sewingmechanism and a horination, with the tambour-frame and its supports andguides giving rectilinear motion in two directions thereto, of apantograph mechanism connected to the supports of the tambour-frame, andthe bar 26, having thereon a series of fulcrum-points for connectionwith the fixed point of the pantograph, said fulcrum-points beingarranged at an angle of forty-five degrees with the two lines ofrectilinear movements of the pantograph, substantiallyas specified.

2. In an embroidering-machine, the combination, with the stitch-formingdevices and the tambour-frame, of a rod carrying said tambour-frame,guides giving true longitndinal movement to said rod, bars movinglongitudinally and in unison at an angle of ninety degrees with the rodand connected at their ends to the supports in which the latter slides,and a pantograph mechanism pivotally attached to the rod carrying thetambourframe, substantially as specified.

3. In an embroidering-machine, the combination, with a bar having studsthereon having rectilinear motion in two directions at right angles toeach other, of an attachable and detachable tambour-frame moving upon ahorizontal table under the needle and having perforations or openingswhich receive studs on the bar, and a pantograph between the saidtambour-frame and the patternchart, substantially as specified.

4:. In an embroidering-niachine, the combination, with a longitudinalbar detachably connected to one side of a tambour-frame,

of guides giving true longitudinal movement to said bar, rods connectedto said guides andhaving adjustment at right angles therewith, pulleysrigid on a shaft beneath the machine-table, cables wound in oppositedirections on said pulleys and attached to the said rods, and apantograph connected to the bar moving the tambour-frame, substantiallyas specified.

5. In an embroidering-machine, the conibination, with pulleys moving inunison, of ca bles attached to posts 011 the peripheries of saidpulleys, said cables being wound thereon in opposite directions andattached at their other ends'to bars moving longitudinally in the planeof rotation, hearings on the ends of said bars, a rod moving in saidbearings, and a pantograph connected to said rod, substantially asspecified.

6. In an embroidering-machine, the combination, with a rod to which thetambourframe is detachably connected, of parallel bars carrying bearingsfor said rod, pulleys moving in unison beneath said bars, cables carriedpartly around said pulley in opposite directions and connected toopposite ends of said bars, and posts turning on the peripheries of saidpulleys and to which the cables are attached, substantially asspecified.

7. In an embroidering-machine, the combizontal table therefor, of atambour-frame having perforations on one side, a rod having studs whichenter said perforations, means for imparting true rectilinear movementin two directions at right angles to each other to said bar, apantograph arranged between the rod and the pattern-chart, and the bar26, having thereon a series of fulcrum-points for connection with thestationary point of the pantograph arranged at an angle of fortyfivedegrees with its two lines of movements, substantially as specified.

8. In an embroidery-machine, the combination ofa tambour-frame, apantograph which controls the movement of the tambour-frame, said framebeing held to true rectilinear movements in two directions, a stitchingdevice adapted to act upon a fabric held by the tambour-frame, and anautomatic stop mechanism, whereby the needle is arrested after eachstitch formation, substantially as described.

9. In an einbroidering-machine, the combination, with a tambour-frame, acarrier or rod having two different rectilinear movements, and apantograph having pivotal connection with the carrier or rod, astitching device adapted to act upon a fabric held by the tambour-frame,of a spring-engaged shipping-lever by which the action of the sewingmechanism is automatically arrested, and a latch mounted 011 a key-barto withdraw the shipper-arm and engage the revolving pulley and shaft,substantially as specified.

10. In an embroidering-machine, the combination, with a carrier-rodhaving rectilinear movement in two directions, of a pantographframepivotally connected to the rod and having perforations at intervals ineach member, and the bar 26, having thereon a series of fulcrum-pointsfor connection with the stationary point of the pantograph arranged atan angle of forty-five degrees with the lines of both the elementalmovements of the pantograph and having pivots or studs at separatepoints, substantially as specified.

11. In an embroidering-machine, the combination, with a carrier or rod,of guides giving longitudinal direction thereto, parallel bars carryingsaid hearings in a direction at right angles to the said longitudinalmovement, pulleys rigid on the same shaft androtating in unison beneathsaid bars, cables attached to opposite ends of each bar carried pasteach other and partly around the pulleys in opposite directions, andposts turning on the peripheries of said pulleys to which the cables areattached, substantially as specified.

12. In an embroidery-machine, the combination, with a tarnbour-frame andpantograph,

of a bar or rod which holds and moves the.

tambour-frame and to which the pantograph is pivotally connected, saidrod having true rectilinear movements in two directions IIO throughconnection with sleeves which are held to parallel movements and inwhich the rod has free end movement, and a stop mechanism, whereby thestroke of the needle is arrested after each stitch formation.

13. In an embroidery-machine, in combination with a stitch-formingdevice, sleeves held to true parallel movements, a rod sliding freely inand heldto parallel movements by said sleeves, a tambour-frame securedto the 10 rod and sharing all its movements, a pantograph pivoted to therod and controlling its RosWELL T. SMITH.

Witnesses:

CHAS. B. TILDEN, WM. B. 'GREELEY.

